1) The pilot can give the co-pilot control of the aircraft and take it back again. I'm not sure if the BF2 engine can do this and if the engines would shut down but it's just something we're throwing out there. ONLY the pilot would be able to decide who is in control.
2) The co-pilot gets a little 'switch' which could be operated by pressing the enter key. This switch will flick between a green and red light in the rear fuselage of the helicopter; alerting squads when they are approaching the LZ.
That's it for now, sorry for not including fast-roping




